/* 中间 */
.content { 
    min-height: 553px;
}

/* 右边内容 */
.center_content { 
    float: left;
    width: 1030px;
    min-height: 553px;
    margin-left: 30px;
    margin-top: -20px;
}

#nav {
    width: 1035px;
    height: auto;
    text-align: center;
}

#nav a {
    width: 339px;
    height: 34px;
    line-height: 34px;
    background-color: #ddd;
    float: left;
    font-weight: 700;
    color: #fff;
}

#nav .li_center{
    display: inline-block;
    border-right: 3px solid #04a2ca;
    border-left: 3px solid #04a2ca;
}

#nav .active a {
    background-color: #04a2ca;
}

.content_a {
    margin-top: 10px;
}

.content_a a {
    color: #8e8e87;
    font-size: 15px;
    font-weight: 600;
}

.content_a .btn_a {
    text-decoration: underline; 
}
 

.content_nav {
    width: 1030px;
    margin-top: 12px;
}

.nav {
    margin-left: 8px;
    margin-bottom: 20px;
}

.nav .nav_li {
    width: 965px;
    padding: 22px;
    border-top: 1px solid #93999f;
    position: relative;
    font-size: 17px;
    font-weight: 600;
}

.nav .nav_li:last-child {
    border-bottom: 1px solid #93999f;
}

.nav_a {
    position: relative;
    display: block;
}

.nav_a .img {
    display: inline-block;
    position: absolute;
    left: 0;
    top: 0;
}

.nav_a .text1 {
    margin-left: 30px;
    display: inline-block;
    color: gray;
}

.nav_a .text2 {
    display: inline-block;
    color: gray;
    position: relative;
    left: 100px;
}

.nav .add_img {
    color: green;
    position: absolute;
    right: 72px;
    top: 18px;
}

.nav .add_img1 {
    color: red;
    position: absolute;
    right: 72px;
    top: 18px;
}

.nav .tri_down {
    display: none;
    position: absolute;
    right: 22px;
    top: 22px;
}

.nav .tri_up {
    display: block;
    position: absolute;
    right: 22px;
    top: 22px;
}


.nav2 {
    margin-left: 30px;
    margin-top: 20px;
}

.nav2 .nav2_li {
    padding: 10px 0 10px 33px;
    background-color: #f3f5f7;
    margin-bottom: 10px;
    font-size: 15px;
    position: relative;
}
.nav2_li a {
    color: #bab9b9;
}

.nav2_li .tri2_img {
    position: absolute;
    left: 13px;
    top: 10px;
}

.nav2_li:hover {
    background-color: #2b333b;
}

.nav2_li:hover a {
    color: #b8bbbe;
}